It's been a red-letter day for commercial spaceflight. First, the unmanned Cygnus capsule from Orbital Sciences Corporation successfully docked today with the International Space Station, making it the second commercial spacecraft to make that trip. After being unloaded, the Cygnus will be filled with refuse. Unlike the SpaceX Dragon, the Cygnus is not designed for re-entry or recovery, so it will end its service as a garbage incinerator on burn-up.

Second, SpaceX successfully launched the upgraded 1.1 version of its Falcon 9 Rocket. This was the first launch for the 1.1, the first launch using the new Merlin D engines, the first launch of a commercial satellite (instead of SpaceX's Dragon capsule), and the first launch from the west coast (from Vandenburg Air Force Base).

I know that sleep is something that I never feel like I get enough of. I've been pretty determined/disciplined the last few months with going to bed early and I feel better than I've felt in a long time.

Doctors now have convincing evidence that they put HIV into remission, hopefully for good, in a Mississippi baby born with the AIDS virus — a medical first that is prompting a new look at how hard and fast such cases should be treated...

The new report, published online Wednesday by the New England Journal of Medicine, makes clear that the girl, now 3, was infected in the womb. She was treated unusually aggressively and shows no active infection despite stopping AIDS medicines 18 months ago.

Doctors won't call it a cure because they don't know what proof or how much time is needed to declare someone free of HIV infection, long feared to be permanent.

Our Milky Way galaxy alone could harbor billions of rocky worlds where water might be liquid at the surface, according to the report, which was published Monday in the Proceedings of the National Academy of Sciences and discussed at a news conference in California.